EXT_mesh_primitive_edge_visibility

[pmconne]

Implements decoding and rendering of EXT_mesh_primitive_edge_visibility.
Fixes #8362.

[danielzhong-bentley]

Still planning to implement the material property for EXT_mesh_primitive_edge_visibility ?

[pmconne]

Still planning to implement the material property for EXT_mesh_primitive_edge_visibility ?

The only thing we would use that for is planar regions for which the outline color differs from the fill color. Today iMdl outputs those as separate polyline primitives entirely, with an isEdge=true flag for the renderer. Changing that looks complicated - I will see how it might be done before deciding whether it's worth doing now in our existing tiler, vs doing it properly in the consolidated tiler.

[pmconne]

Still planning to implement the material property for EXT_mesh_primitive_edge_visibility ?

I implemented the decoding+rendering side in this PR.

[pmconne]

Awaiting ImageTests results. First build spent an hour pulling BisSchemas. Second claimed BisSchemas isn't a git repository.

[pmconne]

No image differences.